Safety stopping mechanism for looms



Nov. 11, 1941. AQ TELLER 2,262,305

SAFETY STOPPING MECHANISM FOR LOOMS Filed May 14, 1940 Patented Nov. 11,1941 SAFETY STOPPING MECHANISM FOR LOQMS Aurelio Tellier, St. Simon,Drummondville, Quebec, Cana-da Application May 14, 1940, serial No.335,109

e claims. (c1. 139-337) mechanism. Frequently one of the cables breaks,

whereup the blade is tilted and serious damage to the machine results ifthe mechanism is not SCPDed- The object of this invention is to providemeans for stopping the machine under these condi- 1 tions. The inventioncomprises essentially a pvoted member mounted beneath the blade andengageable thereby when a cable breaks. This member is linked to a rodwhich is shifted laterally when the member is engaged by a fallingblade. The rod in turn carries a stop that enters the path of aprojection on the crank shaft for oscillating the blade. When the stopis struck by the projection, the rod is shiftedlongitudinally and inturn actuates a stop shaft I which controls the running of the machine.

Preferably, two members of the character described are provided beneaththe blade, one at each end thereof, so that one member or the other isengaged as a result of the breaking of either cable. These members arelinked together and also to the rod as set forth above.

The invention is fully disclosed by way of eX- ample in the followingdescription and in the accompanying drawing in which:

Figure 1 is a partial perspective View of a loom taken from the rear,and

Figure 2 is a detail cross section, illustrating also a multiple blademachine.

Reference to these views will now be made by use of like characterswhich are employed to designate corresponding parts throughout.

In Figure l are shown the usual pick sticks I having their lower ends 2pivoted to a suitable support in the usual manner and their upper endssupporting the rocking comb 3. In rear of the comb 3 and parallelthereto is journalled a crank shaft 4 in the usual manner, the crankthereof being indicated by the numeral 6. Between the crank shaft andthe comb is disposed a so-called blade comprising a rectangular fra-me'I lying in a vertical plane and having Wires 8 stretched verticallyacross the same. In the wires are formed the jack eyes 9. lt will beunderstood that the blade 'I moves up and down and that the comb isoscillated with the pick sticks I through the crank 6 and connectinglinkage as will presently be described. Also, the lay swords support theshuttle box (notshown).

The comb 3 carries a clevis II) in which is swvelled a block II. On thecrank E is mounted a bearing I2 joined to the block II by a pair` ofrods I3, whereby the movement of the crank is imparted to the comb 3.

The stopping mechanism constituting this invention includes a slidablerod I4 mounted horizontally and transversely of the comb 3 at one endthereof and supported in a pair of xed brackets I5 and I5. The reai`bracket I6 receives the rod in a slot Il which permits transverseshifting of the rod as will presently appear. The rear end of the rodcarries a stop I8 adapted to enter the path of a projection I9 on thebearing I2.

Beneath the blade I and near the ends thereof are mounted a pair ofL-shaped supports 20 having one end 2| fixed to the oor or a suitablefixed part of a machine and the other end 22 also fixed in a convenientmanner. On the horizontal leg 23 of each support is pivotally mounted anL- shaped member 24 having an arm 25 extending from one end andperpendicular to the plane thereof. A link 26 joins the rear end of therod I4 to the nearer arm 25, and another link 27 joins the ends of botharms.

The stop I8 is normally drawn out of the path of the member I9 by aspring 28 joining the rod I4 to the bracket I6. At the forward end ofthe rod I4 is mounted the stop shaft 29 which controls the running ofthe machine. is formed a lateral projection or crank 3l) adapted to beengaged by a finger 3i formed on the forward end of the rod I4 when therod is swung in the slot 'I and shifted lengthwise in the mannerpresently to be described.

In the operation of the device, it will be understood that the blade Idescends by gravity, or in some cases by vsprings 32 joining its lovveredge to the xed structure, and is operated by cables 33 in the usualmanner. The members 24 traverse the projected plane of the blade inorder to lie beneath a plurality of blades 'I, as in the modicationillustrated in Figure 2.

In the event that one of the cables 33 breaks, the corresponding framewould tilt at one end and seriously damage the cloth in the making oreven the machine, unless some provision is made for stopping the machineon such an occurrence. The stopping of the machine is accomplished bythe present invention through the medium of the In this shaft members 24disposed at the ends of the blade, one or the other of these membersbeing engaged when one end of the blade drops because of a broken cable.The affected member 24 is obviously turned on the horizontal leg 23 ofits suplport 20, turning also the corresponding arm 25 and pulling thelinks 26`and 21. The turning of the member 24 is assured by initiallyplacing both members in a biased position as clearly shown in Figure 1.

When the links 26 and 21 are pulled, the rod i4 is swung in the slot I1,and the stop I8 enters the path of the projection I9. When the stop isstruck by the projection, the rod I4 is 'pushed lengthwise, whereuponthe finger 3| at the forward end thereof strikes the crank 3D and turnsthe shaft 29 to stop the machine.

Although a specific embodiment of the invention has been illustrated anddescribed, it will be understood that various alterations in the detailsof construction may be made without departing from the scope of theinvention as indicated by the appended claims.

What I claim is:

l. In a loom having a blade, a cable supporting said blade, a comb and acrank shaft for oscillating said comb, a member pivotally mountedbeneath said blade. and engageable thereby on breakage of a cable, a rodmounted for lateral and longitudinal movement adjacent to said crankshaft, a link connecting said member to said rod and adapted to move therod laterally, a projection on said crank shaft, a stop on said rodarranged to enter the path of said projection on the lateral movement ofsaid rod and to impart longitudinal movement to said rod on engagementby said projection, a stop shaft, a projection on said stop shaft, and afinger on said rod arranged to engage said last named projection andactuate said stop shaft on longitudinal movement of said rod.

2. In a loom having a blade, a cable supporting said blade, a comb and acrank shaft for oscillating said comb, a pair of members pivotallymounted beneath said blade near the ends thereof and engageable therebyon breakage of a cable, a rod mounted for lateral and longitudinalmovement adjacent to said crank shaft, a link joining said members andanother link connecting one of said members to said rod and adapted tomove the rod laterally, a projection on said crank shaft, a stop on saidrod arranged to enter the path of said projection on the lateralmovement of said rod and to impart longitudinal movement to said rod onengagement by said projection, a stop shaft, and means on said rod foractuating said stop shaft on longitudinal movement of said rod.

3. In a loom having a blade, a cable supporting said blade, a comb and acrank shaft for oscillating said comb, a pair of U-shaped memberspivotally mounted beneath said blade and engageable thereby on breakageof a cable, an arm extending from each member, a rod mounted for lateraland longitudinal movement adjacent to said crank shaft, a link joiningsaid arms and another link connecting one of said arms to said rod andadapted to move the rod laterally, a projection on said crank shaft, astop on said rod arranged to enter the path of said projection on thelateral movement of said rod and to impart longitudinal movement to saidrod on engagement by said projection, a stop shaft, and means on saidrod for actuating said stop shaft on longitudinal movement of said rod.

AURELIO TELLIER.

